A good place to begin for lots of links, divided into well organized categories is the Ohio Memory Project Links Page (http://www.ohiomemory.org/om/links.html)
D-LIB forum
http://www.dlib.org/
Links plus a monthly magazine for innovation and research in digital libraries.Colorado Digitization Project. General Guidelines for Scanning
http://coloradodigital.coalliance.org/scanning.htmlImage Scanning: A Basic Helpsheet. University of Virginia Library.
http://etext.lib.virginia.edu/helpsheets/scanimage.htmlTechnical Recommendations for Digital Imaging Projects. Image Quality Working Group of ArchivesCom, a joint Libraries/AcIS Committee, 1997.
http://www.columbia.edu/acis/dl/imagespec.html
Digital Imaging: a Practical Handbook, by Stuart D. Lee. Library Association Publishing, November 2000,
Digital Formats for Content Reproductions. Carl Fleischhauer. National Digital Library Program, Library of Congress, July 13, 1998.
http://memory.loc.gov/ammem/formats.htmlFrom the Digitized to the Digital Library. Manfred Thaller. D-Lib Magazine. 7 (2) (February) 2001
http://www.dlib.org/dlib/february01/thaller/02thaller.htmlMoving Theory into Practice: Digital Imaging for Libraries and Archives. Anne R. Kenney, and Oya Y. Rieger, eds. Mountain View, CA: Research Libraries Group, 2000. see website tutorial: http://www.library.cornell.edu/preservation/tutorial/
The history of photography : from 1839 to the present / Beaumont Newhall. New York : Museum of Modern Art ; Boston : Distributed by New York Graphic Society Books, c1982
Care and identification of 19th-century photographic prints / by James M. Reilly Rochester, NY : Eastman Kodak Co., c1986
Collection, use, and care of historical photographs / Robert A. Weinstein and Larry Booth. Nashville : American Association for State and Local History, c1977
Care, Handling and Storage of Photographs. Library of Congress and IFLA Core Programme Preservation and Conservation.
http://www.loc.gov/preserv/care/photolea.htmlCaring for Your Photographs. American Institute For Conservation of Historic and Artistic Works.
http://aic.stanford.edu/treasure/photos.htmlSeizing the light : a history of photography / Robert Hirsch Boston : McGraw-Hill, c2000